feat(python): Added ValidationError.kind and ValidationError.instance attributes

[Stranger6667]

Resolves #650

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 56 lines in your changes missing coverage. Please review.

Project coverage is 86.15%. Comparing base (b3d2d6c) to head (91d8e3f).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
crates/jsonschema-py/src/lib.rs	0.00%	56 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #654      +/-   ##
==========================================
- Coverage   86.49%   86.15%   -0.35%     
==========================================
  Files          90       90              
  Lines       13592    13647      +55     
==========================================
  Hits        11757    11757              
- Misses       1835     1890      +55     

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[codspeed-hq]

CodSpeed Performance Report

Merging #654 will not alter performance

_{Comparing dd/expose-error-kind (91d8e3f) with master (b3d2d6c)}

Summary

✅ 45 untouched benchmarks